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太赫兹恒定速度飞行点用于3D断层成像3D断层成像
Abderezak Aouali1, Stéphane Chevalier1, Alain Sommier1
1I2M TREFLE, UMR 5295 CNRS-UB-ENSAM, 351 Cours de la Libération, 33400 Talence, France.
Journal of imaging
|June 27, 2023
概括
这项研究引入了用于3D化学成像的太赫兹断层扫描技术. 该方法成功地重建了复杂的样本结构,为异质介质提供了有价值的见解.
科学领域:
- 物理 物理学 物理
- 化学 化学 化学
- 影像科学 影像科学
背景情况:
- 特拉赫兹 (THz) 断层扫描提供非电离成像能力.
- 描述异质半透明介质需要先进的3D成像技术.
- 现有的方法可能会在复杂的样本几何学上扎.
研究的目的:
- 开发和验证用于3D化学吸收成像的太赫兹断层扫描技术.
- 评估该技术对非轴对称和复杂样品的适用性.
- 为了证明在异质介质中进行相分离分析的潜力.
主要方法:
- 利用恒定速度飞行点扫描进行太赫兹辐射照明.
- 采用高光谱热转换器和红外摄像头作为检测系统.
- 使用反向投影方法重建了3D吸收系数,该方法基于来自sinogram数据的反向子变换.
主要成果:
- 成功重建了酒凝样本的3D吸收系数.
- 证明了该技术能够用复杂的,非轴对称的形状对样品进行成像的能力.
- 在太赫兹光谱范围内获得了3D定性化学信息,包括潜在相位分离.
结论:
- 开发的太赫兹断层扫描技术对于复杂样品的3D化学成像是有效的.
- 该方法为异质半透明介质的组成提供了有价值的见解.
- 这种技术显示出分析具有复杂结构和不同组成的材料的前景.
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